I think it depends so much on the people involved.
I am a professional horse trainer, and I have a general rule of not dating horse people. I've dated another pro and that was a fine relationship based on mutual respect (ended because he really wanted kids and I really didn't at that time, but a great relationship and mutually beneficial when it came to horse training), but I've also dated guys who want to learn to ride, or (the worst) who think they know what they're doing because they grew up doing it and so are experts in their own minds. I have literally ended relationships because of training-related conflict. Note the plural there, too.
But total novice isn't great either. It's hard to teach someone you're in an intimate relationship with about training, at least from a professional standpoint. As a trainer, when I tell someone to do something, I expect them to either do it, or present a convincing argument about why it isn't appropriate. But often in an intimate relationship, you get the sass without the knowledge...your partner just subconsciously assumes you're equals there because you're equals in the relationship, if that makes sense (and I don't mean that in an offensive way, just obviously when it comes to training there are experience and knowledge differences). And I'm not alone in that...I've literally been hired to tell spouses something that my client has told them a million times, but somehow hearing it from someone who is a professional (as if that means anything in either horse or dog training--anyone can hang out a shingle, it just means you're being paid) makes it meaningful. It is stupid, but we all have our blind spots.
I'm seeing a real future with my current BF (we're living together and talking about a future, so not crazy LOL), and a large part is his attitude to animals. He had 2 cats when we met, but loved horses and dogs too. He'd just never had them as an adult, and admits that. He supports me--he's at every competition I'm in, he goes to animal-related volunteer events, if I ask to help me with a training exercise (which happens pretty much daily) he's there...he clearly loves the animals too. I have to watch him because otherwise he spoils them too much!
So for me, that is perfect. We don't argue (well, not about the animals anyway...), we respect each other, and the biggest annoyance I have with him is impressing on him the difference between "off" and "down!" But also my best friend is happily married for 9 years now, 2 kids, and both are professional trainers who don't always see eye-to-eye...
So yeah, I guess I could have just ended this a lot earlier with my initial sentence. It depends on the people involved.